I had only one friend.我有一个朋友.这里为什么用had 而不是have

我的朋友不止一个翻译 I have?one friend i`ve already had some,这个句子为什么有两个HAVE?一个have一个had. i have had和 i had had 有什么区别? 求翻译i have only ever had one wrinkle,and i am sitting on it. I have my hair cut yesterday.这句话对吗?为什么是have而不是 had? my mom says i have to stop.这里有没有错?为什么 不是my mom said i had to i haven't had any change yet 这里为什么有haven't had怎么翻译? I have had a DVD for a week.这句话为什么用had a DVD.解释为我买DVD已有一周了. I have had the car repaired为什么有had不是have sb done 我拥有我快乐I'm happy because I have had it. 为什么要用过去式? I have had lunch为什么用两个have? i had only to hold out this one more